ruin

the remains of a fallen building, city, etc., or of something devastated, decayed, etc.

a destroyed or dilapidated building, town, etc.

a person regarded as being physically, mentally, or morally a wreck of what he or she was

the state of being destroyed, decayed, dilapidated, etc.

downfall, destruction, devastation, etc.; specif.,

complete loss of means, solvency, position, etc.

moral downfall

loss of chastity in a woman

any cause of a person's downfall, destruction, etc.: gambling was his ruin

Origin of ruin

Middle English ruine ; from Old French ; from Classical Latin ruina ; from ruere, to fall, hurl to the ground ; from Indo-European an unverified form ereu- ; from base an unverified form er-, to set in motion, erect from source run, rise